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-rw-r--r--plugins/mod_s2s/mod_s2s.lua111
1 files changed, 106 insertions, 5 deletions
diff --git a/plugins/mod_s2s/mod_s2s.lua b/plugins/mod_s2s/mod_s2s.lua
index 8d99b855..512c9037 100644
--- a/plugins/mod_s2s/mod_s2s.lua
+++ b/plugins/mod_s2s/mod_s2s.lua
@@ -24,15 +24,20 @@ local new_xmpp_stream = require "util.xmppstream".new;
local s2s_new_incoming = require "core.s2smanager".new_incoming;
local s2s_new_outgoing = require "core.s2smanager".new_outgoing;
local s2s_destroy_session = require "core.s2smanager".destroy_session;
-local s2s_mark_connected = require "core.s2smanager".mark_connected;
local uuid_gen = require "util.uuid".generate;
local cert_verify_identity = require "util.x509".verify_identity;
+local fire_global_event = prosody.events.fire_event;
local s2sout = module:require("s2sout");
local connect_timeout = module:get_option_number("s2s_timeout", 90);
local stream_close_timeout = module:get_option_number("s2s_close_timeout", 5);
+local secure_auth = module:get_option_boolean("s2s_secure_auth", false); -- One day...
+local secure_domains, insecure_domains =
+ module:get_option_set("s2s_secure_domains", {})._items, module:get_option_set("s2s_insecure_domains", {})._items;
+local require_encryption = module:get_option_boolean("s2s_require_encryption", secure_auth);
+
local sessions = module:shared("sessions");
local log = module._log;
@@ -132,6 +137,76 @@ function module.add_host(module)
end
module:hook("route/remote", route_to_existing_session, 200);
module:hook("route/remote", route_to_new_session, 100);
+ module:hook("s2s-authenticated", make_authenticated, -1);
+end
+
+-- Stream is authorised, and ready for normal stanzas
+function mark_connected(session)
+ local sendq, send = session.sendq, session.sends2s;
+
+ local from, to = session.from_host, session.to_host;
+
+ session.log("info", "%s s2s connection %s->%s complete", session.direction, from, to);
+
+ local event_data = { session = session };
+ if session.type == "s2sout" then
+ fire_global_event("s2sout-established", event_data);
+ hosts[from].events.fire_event("s2sout-established", event_data);
+ else
+ local host_session = hosts[to];
+ session.send = function(stanza)
+ return host_session.events.fire_event("route/remote", { from_host = to, to_host = from, stanza = stanza });
+ end;
+
+ fire_global_event("s2sin-established", event_data);
+ hosts[to].events.fire_event("s2sin-established", event_data);
+ end
+
+ if session.direction == "outgoing" then
+ if sendq then
+ session.log("debug", "sending %d queued stanzas across new outgoing connection to %s", #sendq, session.to_host);
+ for i, data in ipairs(sendq) do
+ send(data[1]);
+ sendq[i] = nil;
+ end
+ session.sendq = nil;
+ end
+
+ session.ip_hosts = nil;
+ session.srv_hosts = nil;
+ end
+end
+
+function make_authenticated(event)
+ local session, host = event.session, event.host;
+ if not session.secure then
+ if require_encryption or secure_auth or secure_domains[host] then
+ session:close({
+ condition = "policy-violation",
+ text = "Encrypted server-to-server communication is required but was not "
+ ..((session.direction == "outgoing" and "offered") or "used")
+ });
+ end
+ end
+ if session.type == "s2sout_unauthed" then
+ session.type = "s2sout";
+ elseif session.type == "s2sin_unauthed" then
+ session.type = "s2sin";
+ if host then
+ if not session.hosts[host] then session.hosts[host] = {}; end
+ session.hosts[host].authed = true;
+ end
+ elseif session.type == "s2sin" and host then
+ if not session.hosts[host] then session.hosts[host] = {}; end
+ session.hosts[host].authed = true;
+ else
+ return false;
+ end
+ session.log("debug", "connection %s->%s is now authenticated for %s", session.from_host, session.to_host, host);
+
+ mark_connected(session);
+
+ return true;
end
--- Helper to check that a session peer's certificate is valid
@@ -167,7 +242,7 @@ local function check_cert_status(session)
end
end
end
- module:fire_event("s2s-check-certificate", { host = host, session = session, cert = cert });
+ return module:fire_event("s2s-check-certificate", { host = host, session = session, cert = cert });
end
--- XMPP stream event handlers
@@ -246,7 +321,11 @@ function stream_callbacks.streamopened(session, attr)
end
end
- if session.secure and not session.cert_chain_status then check_cert_status(session); end
+ if session.secure and not session.cert_chain_status then
+ if check_cert_status(session) == false then
+ return;
+ end
+ end
session:open_stream()
if session.version >= 1.0 then
@@ -266,7 +345,11 @@ function stream_callbacks.streamopened(session, attr)
if not attr.id then error("stream response did not give us a streamid!!!"); end
session.streamid = attr.id;
- if session.secure and not session.cert_chain_status then check_cert_status(session); end
+ if session.secure and not session.cert_chain_status then
+ if check_cert_status(session) == false then
+ return;
+ end
+ end
-- Send unauthed buffer
-- (stanzas which are fine to send before dialback)
@@ -287,7 +370,7 @@ function stream_callbacks.streamopened(session, attr)
if not session.dialback_verifying then
hosts[session.from_host].events.fire_event("s2sout-authenticate-legacy", { origin = session });
else
- s2s_mark_connected(session);
+ mark_connected(session);
end
end
end
@@ -526,6 +609,24 @@ function listener.register_outgoing(conn, session)
initialize_session(session);
end
+function check_auth_policy(event)
+ local host, session = event.host, event.session;
+
+ if not secure_auth and secure_domains[host] then
+ secure_auth = true;
+ elseif secure_auth and insecure_domains[host] then
+ secure_auth = false;
+ end
+
+ if secure_auth and not session.cert_identity_status then
+ module:log("warn", "Forbidding insecure connection to/from %s", host);
+ session:close(false);
+ return false;
+ end
+end
+
+module:hook("s2s-check-certificate", check_auth_policy, -1);
+
s2sout.set_listener(listener);
module:hook("server-stopping", function(event)